The 5Boro Join or Die T-Shirt is 100% cotton. "Join or Die" was a well-known political cartoon created by Benjamin Franklin in 1754. The cartoon helped make a point of how important colony unity was between the original 13 colonies. In that time, there was a supserstition that a snake which had been cut into pieces would come back to life if the pieces were put back together before sunset. The cartoon eventually became a symbol of colonial freedom during the American Revolutionary War.